module.exports = {
    /**
	 * 身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X
	 */
	ID:function(card){
		var reg = /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/;  
		return  !reg.test(card);  
	},
	/**
	 * 身份证规则校验
	 */
	checkID:function (val) {
		if(checkCode(val)) {
			var date = val.substring(6,14);
			if(checkDate(date)) {
				if(checkProv(val.substring(0,2))) {
					return true;
				}
			}
		}
		return false;
	},
	/**
	 * 省级地址码校验
	 */
	checkProv:function (val) {
		var pattern = /^[1-9][0-9]/;
		var provs = {11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江 ",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北 ",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏 ",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门"};
		if(pattern.test(val)) {
			if(provs[val]) {
				return true;
			}
		}
		return false;
	}
	/**
	  * 出生日期码校验
	  */
	checkDate:function (val) {
		var pattern = /^(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)$/;
		if(pattern.test(val)) {
			var year = val.substring(0, 4);
			var month = val.substring(4, 6);
			var date = val.substring(6, 8);
			var date2 = new Date(year+"-"+month+"-"+date);
			if(date2 && date2.getMonth() == (parseInt(month) - 1)) {
				return true;
			}
		}
		return false;
	},
	/**
	 * 校验码校验
	 */
	checkCode:function (val) {
	        var p = /^[1-9]\d{5}(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$/;
	        var factor = [ 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 ];
	        var parity = [ 1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2 ];
	        var code = val.substring(17);
	        if(p.test(val)) {
	            var sum = 0;
	            for(var i=0;i<17;i++) {
	                sum += val[i]*factor[i];
	            }
	            if(parity[sum % 11] == code.toUpperCase()) {
	                return true;
	            }
	        }
	        return false;
	}
	
}